PPRuNe Forums - View Single Post - your favourite old timers rules of thumb?
Old 8th July 2008 | 09:35
  #55 (permalink)  
Agaricus bisporus
 
Joined: Dec 1999
Posts: 2,584
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From: UK
No doubt !!!!ehawk will have a clever but unfathomable put down for this post too...

At 500' you can see the legs of cows, but not sheep.
At 250' you can see the legs of sheep.
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